Sealing means



Ai'ng. 12,1930. w. M. sRdoKs 1,772,933

SEALING MEANS Filed Oct. 17, 1928 Patented Aug. 12, 1930 UNETED STATES PATENT OFFICE WINFRED M. BROOKS, OF WEST ORANGE, NEW JERSEY SEALING MEANS Application filed October 17, 1928.

This invention relates to shackle-seals and has for its main object and feature the production of a seal of simple construction andcapable of resisting relatively great force without becoming unsealed.

In the accompanying drawings the invention is disclosed in a concrete and preferred cup-shape portions as they appear after com- 7 pression. V

1 indicates a shackle, here of sheet material, having integrally formed therewith two cupshape portions 2 and 3, in the present instance located at opposite ends.

It will be observed that portion 2 is of greater diameter and shallower than portion 3, and that the latter is of lesser diameter but deeper than portion 2. These portions are nested after the manner shown in Fig. 3, by bending the shackle back upon itself and inserting portion 3 within portion 2. It will be apparent that portion 2 must be slightly larger in diameter than 3, but heretofore'it as been the practice to make the portions of substantially the same depth. I find that by making portion 3 considerably deeper than 2, that, when the parts are compressed by a punch as in Fig. 4, a very intimate engagement of the metallic layers takes place, by reason of the excess of metal in portion 3,

and that it is exceedingly dilficult to there- 40 after separate the parts. If desired, a Weakened zone or opening 4 is located between each portion 2 or 3 and the main body of the Y shackle member which renders it practically impossible to obtain a purchase adjacent r members 2 and 3, suflicient to separate the parts.

I prefer to initially provide portion 2 with a slightly dished top as indicated at 5 in Fig. 8, as it seems to assist in spreading the metal after the manner shown in Fig. 4, when Serial No. 313,031.

compression is applied to the parts by means of a smooth-faced tool.

I claim:

Sealing means including: a shackle memher, and two cup-shape sheet material portions, having closed bottoms, to nest one within the other and to be thereafter sealed by compression, the outer one of said nested portions being of greater diameter and shallower than the inner one, and said inner portion being of lesser diameter and deeper than the outer one.

Signed at New York, in the borough of Manhattan, county and State of New York, this 10th day of October, 1928.

l/VINFRED M. BROOKS. 

